Can you get very many social points from Heroics?
Nope, for now doing more BT would be fastest.
Should I not worry about it much now?
I wouldn't, the gear is just to look different, so no reason for worries. Besides, you can already get most nice stuff with that tier III.
Are there dailies or other things to do at end game for social points?
Nope, not really. BT is still fastest.